Lithium-containing composite oxide and nonaqueous secondary cell using the same, and method for manufacturing the same
AssigneeHitachi Maxell, Ltd.
InventorsAtsushi Ueda, Kazutaka Uchitomi, Shigeo Aoyama
Life of this patent
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Abstract
Because of the composition represented by General Formula: Li1+x+αNi(1−x−y+δ)/2Mn(1−x−y−δ)/2MyO2 (where 0≦x≦0.05, −0.05≦x+α≦0.05, 0≦y≦0.4; −0.1≦δ≦0.1 (when 0≦y≦0.2) or −0.24≦δ≦0.24 (when 0.2≦y≦0.4); and M is at least one element selected from the group consisting of Ti, Cr, Fe, Co, Cu, Zn, Al, Ge and Sn), a high-density lithium-containing complex oxide with high stability of a layered crystal structure and excellent reversibility of charging/discharging can be provided, and a high-capacity non-aqueous secondary battery excellent in durability is realized by using such an oxide for a positive electrode.
Claims35
A non-aqueous secondary battery comprising a positive electrode containing a lithium-containing complex oxide having a layered crystal structure as a positive active material, a negative electrode, and a non-aqueous electrolyte,
- wherein the lithium-containing complex oxide has a composition represented by General Formula:
- Li1+x+αNi(1−x−y+δ)/2Mn(1−x−y−δ)/2MyO2
- (where 0≦x≦0.05, −0.05≦x+α≦0.05, 0≦y≦0.4, −0.1≦δ≦0.1;
- M is Co, or Co and at least one element selected from the group consisting of Ti, Cr, Fe, Cu, Zn, Al, Ge and Sn), and an average valence of Mn is 3.3 to 4.
A non-aqueous secondary battery comprising a positive electrode containing a lithium-containing complex oxide having a layered crystal structure as a positive active material, a negative electrode, and a non-aqueous electrolyte,
- wherein the lithium-containing complex oxide has a composition represented by General Formula:
- LiNi1/3Mn13M1/3O2
- (where M is at least one element selected from the group consisting of Ti, Cr, Fe, Co, Cu, Zn, Al, Ge, and Sn), or a composition in a vicinity thereof, and an average valence of Mn is about 4, and an average valence of Ni is about 2.
A non-aqueous secondary battery comprising a positive electrode containing a lithium-containing complex oxide having a layered crystal structure as a positive active material, a negative electrode, and a non-aqueous electrolyte,
- wherein the lithium-containing complex oxide has a composition represented by General Formula:
- Li1+x+αNi(1−x−y+δ)/2Mn(1−x−y−δ)/2MyO2
- (where 0≦x≦0.05, −0.05≦x+α≦0.05, 0≦y≦0.4, −0.1≦δ≦0.1;
- M is Co, or Co and at least one element selected from the group consisting of Ti, Cr, Fe, Cu, Zn, Al, Ge and Sn), and a true density there of is 4.7 to 4.95 g/cm3, and the positive electrode further contains a lithium-containing cobalt oxide together with the lithium-containing complex oxide.
A non-aqueous secondary battery comprising a positive electrode containing a lithium-containing complex oxide having a layered crystal structure as a positive active material, a negative electrode, and a non-aqueous electrolyte,
- wherein the lithium-containing complex oxide has a composition represented by General Formula:
- Li1+x+αNi(1−x−y+δ)/2Mn(1−x−y−δ)/2MyO2
- (where 0≦x≦0.05, −0.05≦x+α≦0.05, 0≦y≦0.4, −0.24≦δ≦0.24;
- M is Co, or Co and at least one element selected from the group consisting of Ti, Cr, Fe, Cu, Zn, Al, Ge and Sn), and an average valence of Mn is 3.3 to 4.
A non-aqueous secondary battery comprising a positive electrode containing a lithium-containing complex oxide having a layered crystal structure as a positive active material, a negative electrode, and a non-aqueous electrolyte,
- wherein the lithium-containing complex oxide has a composition represented by the General Formula:
- LiNi1/3Mn13M1/3O2
- (where M is at least one element selected from the group consisting of Ti, Cr, Fe, Co, Cu, Zn, Al, Ge, and Sn), or a composition in a vicinity thereof, and the positive electrode further contains a lithium-containing cobalt oxide together with the lithium-containing complex oxide.
Dependencies are inferred from the claim text.